Developing vaccines against infectious and epidemic diseases with the aid of Bioinformatics is now possible, by predicting epitopes on an antigen and finding possible targets for the antibody to bind. A new era of vaccine production is just ahead of us.
Watch out the ppt to know more!!!
Peptide vaccine containing only epitopes capable of inducing positive, desirable T cell and B cell mediated immune response.
Peptides‖ used in these vaccines are 20–30 amino acid sequences that are synthesized to form an immunogenic peptide molecule representing the specific epitope of an antigen.
sufficient for activation of the appropriate cellular and humoral responses
Eliminating allergenic and/or reactogenic responses.
It includes general introduction to antibodies; Monoclonal antibodies; comparison between Polyclonal & Monoclonal antibodies; Hybridoma Technology & Hyridoma Selection; advantages & disadvantages of mABs; Applications of mABs; Recombinant Monoclonal antibodies production through Antibody Engineering.
Developing vaccines against infectious and epidemic diseases with the aid of Bioinformatics is now possible, by predicting epitopes on an antigen and finding possible targets for the antibody to bind. A new era of vaccine production is just ahead of us.
Watch out the ppt to know more!!!
Peptide vaccine containing only epitopes capable of inducing positive, desirable T cell and B cell mediated immune response.
Peptides‖ used in these vaccines are 20–30 amino acid sequences that are synthesized to form an immunogenic peptide molecule representing the specific epitope of an antigen.
sufficient for activation of the appropriate cellular and humoral responses
Eliminating allergenic and/or reactogenic responses.
It includes general introduction to antibodies; Monoclonal antibodies; comparison between Polyclonal & Monoclonal antibodies; Hybridoma Technology & Hyridoma Selection; advantages & disadvantages of mABs; Applications of mABs; Recombinant Monoclonal antibodies production through Antibody Engineering.
SYNTHETIC PEPTIDE VACCINES AND RECOMBINANT ANTIGEN VACCINED.R. Chandravanshi
What is a Vaccine?
A vaccine is a substance that is introduced into the body to prevent infection or to control disease due to a certain pathogen (a disease-causing organism, such as a virus, bacteria or parasite). The vaccine “teaches” the body how to defend itself against the pathogen by creating an immune response.
1 Unlike traditional pharmaceuticals, vaccines are biologics since they are made from living organisms (biological sources).
2 Specifically, vaccines are preparations of components derived from (or related to) a pathogen; they can typically induce a protective effect through one to three very small doses, in the range of micrograms to milligrams.
3 Immunity lasts for an extended period, from one year up to lifetime protection, including prevention of disease and/or related sequelae.
Synthetic peptide vaccines represent fragments of protein antigen sequences, synthesizing specific B cell and T cell epitopes offer the potential to induce diseases neutralizing immuno response with completely synthetic structure. Now it is well established that short chain peptides can be used to mimic antigenic sites of viruses and thus can be used the basics for vaccines and development. therefore, attempts have been made to synthesize such peptides which act as the serrogate immuunogens, as an alternative to the existing conventional vaccines.
Production and applications of monoclonal antibodiesKaayathri Devi
production and applications of monoclonal antibodies, monoclonal antibodies ,applications of monoclonal antibodies, production of monoclonal antibodies,
Vaccine discovery
DNA vaccine, mechanism
methods of delivery
Main concerns: do DNA vaccines cause insertional mutation and elicit anti-DNA antibodies in the body?
completed and ongoing trials.
new strategies: Prime Boost vaccines
Future prospects
Hybridoma technology is a method for producing large number of identical antibodies called monoclonal antibodies.
It was discovered by G.kohler and C.milstein in 1975. they were awarded nobel prize for physiology and medicine in 1975.
The hybrid cells are produced by fusing B- lumphocyte with myeloma cells or tumour cells.
The B-lymphocyte have the ability to produce large number of antibodies and tumour cells have indefinite growth.
This is why two cells are used for the production of hybrid cell
Objectives:
After the end of the presentation we’ll know -
What is cloning vector?
Why cloning vector?
History
Features of a cloning vector
Types of cloning vector
Plasmid
Bacteriophage
Cosmid
Bacterial Artificial Chromosome (BAC)
Yeast Artificial Chromosome (BAC)
Human Artificial Chromosome (HAC)
Retroviral Vectors
What determines choice of vector?
Vector in molecular gene cloning
Cloning vector - The molecular analysis of DNA has been made possible by the cloning of DNA. The two molecules that are required for cloning are the DNA to be cloned and a cloning vector.
A cloning vector is a small piece of DNA taken from a virus, a plasmid or the cell of a higher organism, that can be stably maintained in an organism and into which a foreign DNA fragment can be inserted for cloning purposes.
Most vectors are genetically engineered.
The cloning vector is chosen according to the size and type of DNA to be cloned.
The vector therefore contains features that allow for the convenient insertion or removal of DNA fragment in or out of the vector, for example by treating the vector and the foreign DNA with a restriction enzyme and then ligating the fragments together.
After a DNA fragment has been cloned into a cloning vector, it may be further subcloned into another vector designed for more specific use.
SYNTHETIC PEPTIDE VACCINES AND RECOMBINANT ANTIGEN VACCINED.R. Chandravanshi
What is a Vaccine?
A vaccine is a substance that is introduced into the body to prevent infection or to control disease due to a certain pathogen (a disease-causing organism, such as a virus, bacteria or parasite). The vaccine “teaches” the body how to defend itself against the pathogen by creating an immune response.
1 Unlike traditional pharmaceuticals, vaccines are biologics since they are made from living organisms (biological sources).
2 Specifically, vaccines are preparations of components derived from (or related to) a pathogen; they can typically induce a protective effect through one to three very small doses, in the range of micrograms to milligrams.
3 Immunity lasts for an extended period, from one year up to lifetime protection, including prevention of disease and/or related sequelae.
Synthetic peptide vaccines represent fragments of protein antigen sequences, synthesizing specific B cell and T cell epitopes offer the potential to induce diseases neutralizing immuno response with completely synthetic structure. Now it is well established that short chain peptides can be used to mimic antigenic sites of viruses and thus can be used the basics for vaccines and development. therefore, attempts have been made to synthesize such peptides which act as the serrogate immuunogens, as an alternative to the existing conventional vaccines.
Production and applications of monoclonal antibodiesKaayathri Devi
production and applications of monoclonal antibodies, monoclonal antibodies ,applications of monoclonal antibodies, production of monoclonal antibodies,
Vaccine discovery
DNA vaccine, mechanism
methods of delivery
Main concerns: do DNA vaccines cause insertional mutation and elicit anti-DNA antibodies in the body?
completed and ongoing trials.
new strategies: Prime Boost vaccines
Future prospects
Hybridoma technology is a method for producing large number of identical antibodies called monoclonal antibodies.
It was discovered by G.kohler and C.milstein in 1975. they were awarded nobel prize for physiology and medicine in 1975.
The hybrid cells are produced by fusing B- lumphocyte with myeloma cells or tumour cells.
The B-lymphocyte have the ability to produce large number of antibodies and tumour cells have indefinite growth.
This is why two cells are used for the production of hybrid cell
Objectives:
After the end of the presentation we’ll know -
What is cloning vector?
Why cloning vector?
History
Features of a cloning vector
Types of cloning vector
Plasmid
Bacteriophage
Cosmid
Bacterial Artificial Chromosome (BAC)
Yeast Artificial Chromosome (BAC)
Human Artificial Chromosome (HAC)
Retroviral Vectors
What determines choice of vector?
Vector in molecular gene cloning
Cloning vector - The molecular analysis of DNA has been made possible by the cloning of DNA. The two molecules that are required for cloning are the DNA to be cloned and a cloning vector.
A cloning vector is a small piece of DNA taken from a virus, a plasmid or the cell of a higher organism, that can be stably maintained in an organism and into which a foreign DNA fragment can be inserted for cloning purposes.
Most vectors are genetically engineered.
The cloning vector is chosen according to the size and type of DNA to be cloned.
The vector therefore contains features that allow for the convenient insertion or removal of DNA fragment in or out of the vector, for example by treating the vector and the foreign DNA with a restriction enzyme and then ligating the fragments together.
After a DNA fragment has been cloned into a cloning vector, it may be further subcloned into another vector designed for more specific use.
What are Antibody
Monoclonal Antibody (mAb)
Structure of mAb
Types of Monoclonal Antibody (mAb)
Preparation of Monoclonal Antibody
Hybridoma Technique, Phage display Technique
Application of Monoclonal Antibody
Advantage and Disadvantage of Monoclonal Antibody
Monoclonal antibodies (mAb or moAb) are antibodies that are made by identical immune cells that are all clones of a unique parent cell. Monoclonal antibodies can have monovalent affinity, in that they bind to the same epitope (the part of an antigen that is recognized by the antibody). In contrast, polyclonal antibodies bind to multiple epitopes and are usually made by several different plasma cell (antibody secreting immune cell) lineages. Bispecific monoclonal antibodies can also be engineered, by increasing the therapeutic targets of one single monoclonal antibody to two epitopes. Given almost any substance, it is possible to produce monoclonal antibodies that specifically bind to that substance; they can then serve to detect or purify that substance. This has become an important tool in biochemistry, molecular biology, and medicine. When used as medications, non-proprietary drug names end in -mab and many immunotherapy specialists use the word mab anacronymically.
Students of medical and allied subjects must be exposed to the concept of monoclonal antibodies for the efficient practice of clinical and laboratory medicine.
BIOTECHNOLOGY IS
CHALLENGING SUBJECT TO TEACH AND UNDERSTAND ......
ITS A VERY INTERESTING TO LEARN ABOUT HYBRIDOMA TECHNOLOGY .. THEIR PRODUCTION AND
APPLICATION ALSO ....
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
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Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
2. Monoclonal antibodies (mAb or moAb)
Monoclonal antibodies are:
monospecific antibodies that are identical because they are
produced by one type of immune cell (a single parent cell).
Antibodies produced from a single clone of B cells.
Produced by fusing a B cell secreting the desired antibody
with a myeloma cell capable of growing indefinitely in tissue
culture.
Monoclonal antibodies all have identical antigen-binding sites.
i.e. they all bind to the same epitope with the same affinity.
They are all of the same antibody class (isotype).
3. Polyclonal antibodies
• are a mixture of antibodies with different
antigen binding sites that may bind to different
epitopes or antigens with varying affinities.
• They may be of different antibody classes.
• The serum obtained from an immunized
animal is referred to as a polyclonal antiserum.
4. Hybridoma
are cells that have been engineered to produce a desired
antibody in large amounts.
To produce monoclonal antibodies, B-cells are removed
from the spleen of an animal that has been challenged with
the relevant antigen
These B-cells are then fused with myeloma tumor cells that
can grow indefinitely in culture
This fusion is performed by making the cell membranes
more permeable.
The fused hybrid cells (hybridomas), being cancer cells,
will multiply rapidly and indefinitely and will produce
large amounts of the desired antibodies
5. Practical steps in monoclonal antibody production:
1) Immunize animal
2) Isolate spleen cells (containing antibody-producing B cells)
3) Fuse spleen cells with myeloma cells (e.g. using PEG - polyethylene
glycol)
4) Allow unfused B cells to die
5) Add aminopterin to culture to kill unfused myeloma cells
6) Clone remaining cells (place 1 cell/well and allow each cell to grow into a
clone of cells)
7) Screen supernatant of each clone for presence of the desired antibody.
8) Grow the chosen clone of cells in tissue culture indefinitely.
9) Harvest antibody from the culture supernatant.
6.
7. Myeloma cells lack certain enzymes so that
they can not use hypoxanthine, aminopterin,
and thymidine(HAT medium) as a source for
nucleic acid biosynthesis and will die in
culture.
Only B cells that have fused with the
engineered myeloma cells will survive in
culture when grown in HAT medium.
Hybridoma Selection
The “HAT Trick”
8. Purification of monoclonal Antibodies
Cotaminants:
Media components: hormones, growth factors, transferrins……etc
Viral, bacterial,endotoxins….etc
Methods of purification:
1. Filteration for larger particles
2. Ultrafilteration esp. for low concentration samples
3. Chromatography:
• Ion exchange chromatography (either cation or anion) can be used
(Most impurities are usually anions)
• Size exclusion chromatography
9. Recombinant monoclonal antibodies
• The term recombinant and especially recombinant DNA refers
to an artificial method of producing DNA (synthetic DNA and
proteins).
• Recombinant DNA is produced through the addition of
relevant DNA into an existing organismal genome, such as the
plasmid of bacteria
• Recombinant antibody engineering involves the use of viruses
or yeast to create antibodies, rather than mice.
• A segment of DNA is recombined (recombinant) with the
original DNA of the bacteria, these genetically modified
bacteria rapidly reproduce and by that reproduce the DNA
segment that was recombined with the original genome.
10. Measuring protein and drug levels in serum
Typing tissue and blood
Identifying infectious agents
Identifying clusters of differentiation (CDs) for
classification and follow-up therapy of leukemias and
lymphomas
Identifying tumor metastasis
Identifying and quantifying hormones
Immunoaffinity Purification
Uses of monoclonal AbsUses of monoclonal Abs
11. Applications of Monoclonal Antibodies
• Diagnostic Applications
• Therapeutic Applications
Transplant rejection
Cardiovascular disease
Cancer
Infectious Diseases
Inflammatory disease
• Clinical Applications
Purification of drugs, Imaging the target
• Future Applications
Fight against Bioterrorism
12. Diagnostic Applications
1. Tissues and tumors can be classified based on their
expression of certain defined markers: e.g. Prostate
specific antigen(PSA)
2. Classification of tissues and tumors
3. Distinguishing morphologically similar lesions, like
mesothelioma and adenocarcinoma
4. Detecting small quantities of metastatic cancer and
MDR
13. Therapeutic Applications
One possible treatment for cancer involves monoclonal antibodies
that bind only to cancer cell-specific antigens and induce an
immunological response against cancer cells.
Three mechanisms responsible for the cancer
treatment:
1.mAbs act directly when binding to a cancer specific antigens and
induce immunological response to cancer cells(apoptosis,
inhibiting growth)
2.mAbs can be modified for delivery of a toxin, radioisotope,
cytokine or other active conjugates.
3.it is also possible to design bispecific antibodies that can bind with
their Fab regions both to target antigen and to an effector cell